Implement BookStoreAuthorities class

Signed-off-by: Pekka Helenius <fincer89@hotmail.com>

bookstore/src/main/java/com/fjordtek/bookstore/service/session/BookStoreAuthorities.java

@@ -0,0 +1,41 @@
+//Pekka Helenius <fincer89@hotmail.com>, Fjordtek 2020
+
+package com.fjordtek.bookstore.service.session;
+
+import javax.annotation.PostConstruct;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.core.env.Environment;
+import org.springframework.stereotype.Component;
+
+/**
+*
+* This class gets Spring Environment key property values from
+* Spring property sources and inserts them into publicly
+* accessible class attributes.
+* <p>
+* The attribute values of this class are primarily used,
+* for instance, within @PreAuthorize annotations.
+*
+* @author Pekka Helenius
+*/
+
+@Component("BookAuth")
+public class BookStoreAuthorities {
+
+	@Autowired
+	private Environment env;
+
+	public String ADMIN, HELPDESK, SALES, USER;
+
+	@PostConstruct
+	private void constructAuthorities() {
+		this.ADMIN    = env.getProperty("auth.authority.admin");
+		this.HELPDESK = env.getProperty("auth.authority.helpdesk");
+		this.SALES    = env.getProperty("auth.authority.sales");
+		this.USER     = env.getProperty("auth.authority.user");
+	}
+
+}
+
+